COVID-19 Omicron subvariant XBB.1.5 now accounts for 61% of cases nationwide SeekingAlpha 27 Jan 2023
New Omicron subvariant expected to become dominant in Ontario as cases rise CP24 17 Jan 2023 Cases of a new, highly-transmissible Omicron subvariant have risen in Ontario, and the former head of the province’s science..